<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Login</title>
</head>
<body>
<h1>this is login page</h1>
<p style="color: red">
    {{ err_msg }}
</p>
<form action="/login" method="post">
    username:<input type="text" name="username"/>
    password:<input type="text" name="password">
    <input type="submit" value="login"/>

</form>
</body>
</html>